CA1234851A - Monostable type relay - Google Patents
Monostable type relayInfo
- Publication number
- CA1234851A CA1234851A CA000452647A CA452647A CA1234851A CA 1234851 A CA1234851 A CA 1234851A CA 000452647 A CA000452647 A CA 000452647A CA 452647 A CA452647 A CA 452647A CA 1234851 A CA1234851 A CA 1234851A
- Authority
- CA
- Canada
- Prior art keywords
- core
- movable
- upstanding
- legs
- contact
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H51/00—Electromagnetic relays
- H01H51/22—Polarised relays
- H01H51/2227—Polarised relays in which the movable part comprises at least one permanent magnet, sandwiched between pole-plates, each forming an active air-gap with parts of the stationary magnetic circuit
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Electromagnets (AREA)
- Relay Circuits (AREA)
- Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
Abstract
ABSTRACT OF THE DISCLOSURL
A monostable relay comprises a bar-like core having a coil, and a yoke connected to the core and extending in parellel therewith. An armature including a permanent magnet is laterally movably disposed between a pair of upstanding legs formed at a free end of the yoke. Movable contacts are operationally coupled to the armature. The upstanding legs of the yoke have effective areas of magnetic pole differing from each other.
Upon energiztion of the coil, the armature is moved toward the upstanding leg having the smaller magnetic pole area to close one of the stationary contacts by overcoming the resilient resistance of the movable contact arm. Upon deenergization, the movable contact is restored to the other stationary contact under the resilient restoring force of the movable contact arm.
A monostable relay comprises a bar-like core having a coil, and a yoke connected to the core and extending in parellel therewith. An armature including a permanent magnet is laterally movably disposed between a pair of upstanding legs formed at a free end of the yoke. Movable contacts are operationally coupled to the armature. The upstanding legs of the yoke have effective areas of magnetic pole differing from each other.
Upon energiztion of the coil, the armature is moved toward the upstanding leg having the smaller magnetic pole area to close one of the stationary contacts by overcoming the resilient resistance of the movable contact arm. Upon deenergization, the movable contact is restored to the other stationary contact under the resilient restoring force of the movable contact arm.
Description
~ 23~1~5~L
The present invention generally relates ko a polarized relay of a miniature siæe adapted to be mounted, for example, on a substrate for a printed circuit.
In particular, the invention concerns an improvement on or relating to a polarized relay of such a structure which com-prises an electromagnetic coil assembly, a bar-like iron core inserted in the coil assembly, a movable magnetic block, and movable contact members, wherein the movable contact members are actuated selectively to either one of two switch positions by means of the movable magnetic block in response to energization or deenergization of the electromagnetic coil assembly.
To have a better understanding of the present invention, reference will be made to the accompanying drawings in which:
Figure 1 is an exploded perspective view of a hitherto known polarized relay;
Figure 2ta) is a top plan view showing the polarized relay in the assembled state;
Figure 2(b) is a side elevational v.iew of the same;
Figure 2tC) is a partially broken end view of the same, Figure 3 is a view for graphically illustrating the operation characteristics of the hitherto known polarized relay;
Figure 4 is a view for graphically illustrating opera-tion characteristics of a polarized relay according to an e~em-plary embodiment of the invention; and Figure 5 is a perspective.view showing a structure of the yoke which may be used in the relay according to the invention.
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Figures 1, 2(a), 2(b) and 2(c) illustrate a known polarized relay. The known relay includes an electromagnetic coil 1 wound on a spool 3 which has a through-hole 3a into which a bar-like iron core 2 is inserted. The iron core 2 has an enlarged end portion which serves as stoppers 2a and 2b. In the state in which the core Z is inserted completely in the through-
The present invention generally relates ko a polarized relay of a miniature siæe adapted to be mounted, for example, on a substrate for a printed circuit.
In particular, the invention concerns an improvement on or relating to a polarized relay of such a structure which com-prises an electromagnetic coil assembly, a bar-like iron core inserted in the coil assembly, a movable magnetic block, and movable contact members, wherein the movable contact members are actuated selectively to either one of two switch positions by means of the movable magnetic block in response to energization or deenergization of the electromagnetic coil assembly.
To have a better understanding of the present invention, reference will be made to the accompanying drawings in which:
Figure 1 is an exploded perspective view of a hitherto known polarized relay;
Figure 2ta) is a top plan view showing the polarized relay in the assembled state;
Figure 2(b) is a side elevational v.iew of the same;
Figure 2tC) is a partially broken end view of the same, Figure 3 is a view for graphically illustrating the operation characteristics of the hitherto known polarized relay;
Figure 4 is a view for graphically illustrating opera-tion characteristics of a polarized relay according to an e~em-plary embodiment of the invention; and Figure 5 is a perspective.view showing a structure of the yoke which may be used in the relay according to the invention.
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.;
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Figures 1, 2(a), 2(b) and 2(c) illustrate a known polarized relay. The known relay includes an electromagnetic coil 1 wound on a spool 3 which has a through-hole 3a into which a bar-like iron core 2 is inserted. The iron core 2 has an enlarged end portion which serves as stoppers 2a and 2b. In the state in which the core Z is inserted completely in the through-
- 2 - ~ ~34~5~
hole or bore 3a of the spool 3, the end portion serving as the stoppers 2a and 2b projects outwardly ~rom the end o the spool
hole or bore 3a of the spool 3, the end portion serving as the stoppers 2a and 2b projects outwardly ~rom the end o the spool
3. A yoke 4 is disposed below the electromegnetic coil assembly 1 so as to form a magnetic circuit in cooperation with the iron core 2. The yoke ~ is of a substantially U-shapecl configuration and has a pair of bifurcated upstanding legs 4a and ~b formed integrally at the free end. In the assembled state, the end portion (2a, 2b) of the core 2 is disposed substantially at a mid point between the upstanding legs 4a and 4b of the yoke 4.
A movable magnetic block or armature is constructed generally U-shaped in section having a pair of legs magnetically polarized in opposite to each other or otherwise, is constituted by a perma-nent magnet 6 which is fixedly sandwiched between pole pieces or plates 5a and 5b and held together by means of a frame-like holder denoted by a numeral 7 as shown in Fig. l. In the assembled state of the polarized relay, the movable magnetic block or ... ...
armature held by the holder 7 is disposed laterally movably between the pair of upstanding legs 4a and 4b of the yoke 4, wherein the l~ enlarged end portion serving as the stoppers 2a and 2b of the core Y 20 2 is positioned in a space defined between the pole plates ~ and in opposition to the permanent magnet 6. There are thus formed air gaps between the core 2 and the pole plates ~5a, 5b) on one hand and between the upstanding le$s (~a, ~b) of the yoke
A movable magnetic block or armature is constructed generally U-shaped in section having a pair of legs magnetically polarized in opposite to each other or otherwise, is constituted by a perma-nent magnet 6 which is fixedly sandwiched between pole pieces or plates 5a and 5b and held together by means of a frame-like holder denoted by a numeral 7 as shown in Fig. l. In the assembled state of the polarized relay, the movable magnetic block or ... ...
armature held by the holder 7 is disposed laterally movably between the pair of upstanding legs 4a and 4b of the yoke 4, wherein the l~ enlarged end portion serving as the stoppers 2a and 2b of the core Y 20 2 is positioned in a space defined between the pole plates ~ and in opposition to the permanent magnet 6. There are thus formed air gaps between the core 2 and the pole plates ~5a, 5b) on one hand and between the upstanding le$s (~a, ~b) of the yoke
4 and the pole plates (5a, 5b), respectively. The stopper faces 2a and 2b serve to limit the movement of the movable magnetic block constituted by the permanent magnet 6 and the pole piece plates 5a and 5b held together by the holder 7. The holder 7 has a pair of depending legs 7a and 7b formed with respectlve guide grooves in which movable contact members or arms 8' and 8"
:
~ 23~35~
are inserted, respectively, as is shown in Fig. 2b.
The component 1 to 10 mentioned above are mounted on a base plate 11 which carries connector pins Al, A2, Bl B2, Cl and C~
depending downwardly. The relay thus assembled is protected by a cover case 12.
In operation, when the electromagnetic coil 1 is elec-trically energized in one direction, the iron core 2 is magnetized in a corresponding direction, as a result of which there are formed magnetic poles in the upstanding legs 4a and 4b of the yoke 4, respectively. In this connection, it is assumed that the permanent magnet 6 is magnetized as indicated by symbols S and N in ~ig. I
and that N-pole makes appearance in the upstanding leg 4b of the yoke 4 through the energization mentioned above. On the assumption, the holder 7 holding the movable magnetic block is moved toward the upstanding leg 4b under magnetic attraction acting between the leg 4b and the permanent magnet 6 as well as under repulsing force acting ~~ betw0en the magnet 6 and the leg 4a of the yoke 4. When the force acting on the holder 7 and hence the movable magnetic block or armature overcomes the spring force or resilient resis-tance of the movable contact arms 8' and 8'`, the latter are moved toward stationary contacts 10, respectively, resulting in that the contacts of the movable contact arms 8' and 8" are closed to the stationary contacts 10. This is because the movable contact arms 8' and 8" are operationally coupled to the holder 7 at the depending legs 7a and 7b, respectively, as described above. On the other hand, when the direction of the current flowing through the electromagnetic coil 1 is changed over~ the series of opera-tions described above take place in the reverse direction, whereby :
the contacts carried by~the movable contact arms 8' and 8" are detached from the stationary contacts l0 to be closed to ,.
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other stationary contacts 9, respectively. The ~elay designed - to perform the above operation is generally referred to as the latching or bistable type relay.
~ c c o ~
, Fig. 3 of the ~UU~ffl~g drawings graphically illust~
rates operation oharacteristics of such bistable relay. In the figure, a broken line curve I represents intrinsic resilient resistance of the movable contact arms ~' and 3" which has to be overcome by the electromagnetic force in the switching operation of the relay. This curve I may be referred to as the load characteristic curve. In Fig. 3, the stroke of the moveble contact arm performed upon switching operation of the relay is taken along the abscissa. The electromagnetic Eorce (actuating force) required to mov~e the movable contact to one of the statlo-nary contacts, e.g. the contact 10, is taken along the lefthand ordinate, while the electromagnetic force (restoring Eorce) , .._.. .
required for the restoration of the movable contact 10 to the other stationary contact 9 is taken along the righthand ordinate.
Intersection of the load curve I with the abscissa at a point 0.2 means that the movable contact carried by the arm 3 is located at the mid position between the stationary contacts 9 and 10. Solid curves represent stepwise the levels of the excitation current of the magnetic coil 1. As will be seen from fig. 3, so long as the movable contact is in the state closed to the stationary contact, this state is maintained even in the deenergized state of the magnetic coil (excitation current of 0%), because of the magnetic force of the permanent magnet 6. In order to love the movable contact away from the ,- :
". ,
:
~ 23~35~
are inserted, respectively, as is shown in Fig. 2b.
The component 1 to 10 mentioned above are mounted on a base plate 11 which carries connector pins Al, A2, Bl B2, Cl and C~
depending downwardly. The relay thus assembled is protected by a cover case 12.
In operation, when the electromagnetic coil 1 is elec-trically energized in one direction, the iron core 2 is magnetized in a corresponding direction, as a result of which there are formed magnetic poles in the upstanding legs 4a and 4b of the yoke 4, respectively. In this connection, it is assumed that the permanent magnet 6 is magnetized as indicated by symbols S and N in ~ig. I
and that N-pole makes appearance in the upstanding leg 4b of the yoke 4 through the energization mentioned above. On the assumption, the holder 7 holding the movable magnetic block is moved toward the upstanding leg 4b under magnetic attraction acting between the leg 4b and the permanent magnet 6 as well as under repulsing force acting ~~ betw0en the magnet 6 and the leg 4a of the yoke 4. When the force acting on the holder 7 and hence the movable magnetic block or armature overcomes the spring force or resilient resis-tance of the movable contact arms 8' and 8'`, the latter are moved toward stationary contacts 10, respectively, resulting in that the contacts of the movable contact arms 8' and 8" are closed to the stationary contacts 10. This is because the movable contact arms 8' and 8" are operationally coupled to the holder 7 at the depending legs 7a and 7b, respectively, as described above. On the other hand, when the direction of the current flowing through the electromagnetic coil 1 is changed over~ the series of opera-tions described above take place in the reverse direction, whereby :
the contacts carried by~the movable contact arms 8' and 8" are detached from the stationary contacts l0 to be closed to ,.
-~ ~3~5~
other stationary contacts 9, respectively. The ~elay designed - to perform the above operation is generally referred to as the latching or bistable type relay.
~ c c o ~
, Fig. 3 of the ~UU~ffl~g drawings graphically illust~
rates operation oharacteristics of such bistable relay. In the figure, a broken line curve I represents intrinsic resilient resistance of the movable contact arms ~' and 3" which has to be overcome by the electromagnetic force in the switching operation of the relay. This curve I may be referred to as the load characteristic curve. In Fig. 3, the stroke of the moveble contact arm performed upon switching operation of the relay is taken along the abscissa. The electromagnetic Eorce (actuating force) required to mov~e the movable contact to one of the statlo-nary contacts, e.g. the contact 10, is taken along the lefthand ordinate, while the electromagnetic force (restoring Eorce) , .._.. .
required for the restoration of the movable contact 10 to the other stationary contact 9 is taken along the righthand ordinate.
Intersection of the load curve I with the abscissa at a point 0.2 means that the movable contact carried by the arm 3 is located at the mid position between the stationary contacts 9 and 10. Solid curves represent stepwise the levels of the excitation current of the magnetic coil 1. As will be seen from fig. 3, so long as the movable contact is in the state closed to the stationary contact, this state is maintained even in the deenergized state of the magnetic coil (excitation current of 0%), because of the magnetic force of the permanent magnet 6. In order to love the movable contact away from the ,- :
". ,
- 5 - ~23~5~
stationary contact, the excitation current supplied to the coil in the corresponding direction rnust rise up to the level of more l-han 20% of the rated value (100%). In thls way, in tlle case of the bistable relay, energization of the coil is required every time the movable contact is ehanged over from one to the other stationary contact.
In practice, however, there are some applications in which the relay of monostable type is to be employed which has only one stable contact state. For e~ample, when the i]lustrated relay has to be realized in the monostable structure, arrangement must be made such that the movable contact elosed to one of the stationary contacts, e.g. the contact lO, upon energization of the magnetie coil is restored to the other stationary eontaet 9 upon deenergization of the coil. The operation cbaracteristies of the monostable type relay are graphieally illustrated in Fig. 4. It will be seen that the movable contact is spontaneously restored to the stationary contact when the coil current is 0%.
. When the monostable relay is to be realized starting from the bistable relay described hereinbefore, efEort has heretofore been primarily made to impart a restoring resilliency to the movable eontaet arm (8', 8") itself by appropriately deforming the movable contact arm 8', 8" through adjustment of the foot portion (8a) at whieh the movable contact arm is mounted on the base plate ll in consideration of the operating`voltage, the voltage level at which the movable contact ls restored to the contact of the stable position and other factors. This adjusting procedure which must be performed for the individual
stationary contact, the excitation current supplied to the coil in the corresponding direction rnust rise up to the level of more l-han 20% of the rated value (100%). In thls way, in tlle case of the bistable relay, energization of the coil is required every time the movable contact is ehanged over from one to the other stationary contact.
In practice, however, there are some applications in which the relay of monostable type is to be employed which has only one stable contact state. For e~ample, when the i]lustrated relay has to be realized in the monostable structure, arrangement must be made such that the movable contact elosed to one of the stationary contacts, e.g. the contact lO, upon energization of the magnetie coil is restored to the other stationary eontaet 9 upon deenergization of the coil. The operation cbaracteristies of the monostable type relay are graphieally illustrated in Fig. 4. It will be seen that the movable contact is spontaneously restored to the stationary contact when the coil current is 0%.
. When the monostable relay is to be realized starting from the bistable relay described hereinbefore, efEort has heretofore been primarily made to impart a restoring resilliency to the movable eontaet arm (8', 8") itself by appropriately deforming the movable contact arm 8', 8" through adjustment of the foot portion (8a) at whieh the movable contact arm is mounted on the base plate ll in consideration of the operating`voltage, the voltage level at which the movable contact ls restored to the contact of the stable position and other factors. This adjusting procedure which must be performed for the individual
- 6 ~L23~
relays is extremcly delicate and troublesome, providing a great obstacle in fabricating the monostable type relay on a large scale manuacturing basis. To evade the difficulty, it is conceivable to previously deform the movable contact arm 8 beore mounting on the base plate. I-lowever, since the terminal pins Al, A2, Bl and B2 are already mounted on the base plate wher the terminal pins Cl and C2 which support the movable contact arms 8' and 8" are to be secured to the base plate, it is practically impossible to mount the pins Cl and C2 on the base plate from the above. rurther, the terminal pins Cl and C2 themselves may be previously bent or deformed so as to i.mpar~
the desired resilience characteristic to the movable contact arm when mounted on the base plate. However, because of unevenness in thickness and hardness of the pins which brings about un-evenness in the deformation of the pins, the subsequent adjustmentof the movable contact arms is inevitable~
SUMMARY OF THE INVENTION
Accordingly, an object of the present invention is to provide a monostable type relay which is evaded from the diffi-culties enco~mtered in the manufacturing of the hitherto Icnownrelays.
Another object of the present invention is to provide a monostable type relay which can be easily manufactured on a large scale production basis without requiring troublesome ad~ustments of the movable contact arms for realizing the desired operation characteristics.
In view o~ the above obJe:ts, it 's taught by the ":.
relays is extremcly delicate and troublesome, providing a great obstacle in fabricating the monostable type relay on a large scale manuacturing basis. To evade the difficulty, it is conceivable to previously deform the movable contact arm 8 beore mounting on the base plate. I-lowever, since the terminal pins Al, A2, Bl and B2 are already mounted on the base plate wher the terminal pins Cl and C2 which support the movable contact arms 8' and 8" are to be secured to the base plate, it is practically impossible to mount the pins Cl and C2 on the base plate from the above. rurther, the terminal pins Cl and C2 themselves may be previously bent or deformed so as to i.mpar~
the desired resilience characteristic to the movable contact arm when mounted on the base plate. However, because of unevenness in thickness and hardness of the pins which brings about un-evenness in the deformation of the pins, the subsequent adjustmentof the movable contact arms is inevitable~
SUMMARY OF THE INVENTION
Accordingly, an object of the present invention is to provide a monostable type relay which is evaded from the diffi-culties enco~mtered in the manufacturing of the hitherto Icnownrelays.
Another object of the present invention is to provide a monostable type relay which can be easily manufactured on a large scale production basis without requiring troublesome ad~ustments of the movable contact arms for realizing the desired operation characteristics.
In view o~ the above obJe:ts, it 's taught by the ":.
-7-present invention that the magnet.ic operating force character-istic be matched with the load characteristic instead of making the latter conform with the former.
To this end, it is proposed according to an aspect of the present invention that the upstanding opposite legs o~ ~he yoke which forms a magnetic circuit in cooperation with the iron core are differentiated from each other in respect of the mag-netic pole area.
According to the invention, it is proposed to employ a yoke of the structure shown in Figure 5 in the relay described hereinbefore in conjunction with Fi~ures 1, 2 and 3 instead of
To this end, it is proposed according to an aspect of the present invention that the upstanding opposite legs o~ ~he yoke which forms a magnetic circuit in cooperation with the iron core are differentiated from each other in respect of the mag-netic pole area.
According to the invention, it is proposed to employ a yoke of the structure shown in Figure 5 in the relay described hereinbefore in conjunction with Fi~ures 1, 2 and 3 instead of
- 8 - ~2~
the yoke 4 ShOWIl in ~ig. 1. Except for this feature, the other structure of the relay accord;ng to the invention is same as that of the hitherto known relay.
Referring to Fig. 5, a reference numeral 13 shows a yoke of substan'.ially U-like configuration. The yoke 13 has a leg~ 3c at one end to which the core wound with an electromagrletlc coil is fixedly connected. A pair of upstanding legs 13a and l3b are provided at the other end in opposition to each other with a distance therebetween for accommodating movably the movable magnetic block or armature constituted by the permanent magnet and others as described hereinbefore. It is important to note that ~he leg 13a is partially cut away in order to reduce the effective area of the magnetic pole when compared with that of the other leg 13b. The yoke 13 is incorporated in the structure of the polarized relay in the same manner as the hitherto known ." _..
relay.
In operation, upon electric energization of the magnetic coil, the movab~e magnetic block or armature can be ~caused to be attracted to the upstanding lèg 13a when the magnetization oE
the permanent magnet 6 and other factors are correspondingly dimensioned, whereby the movable contacts carried by the resilient contact arms are closed to respective ones of the stationary contacts. On the other hand, upon deenergization of the relay tcorresponding to excltation c~lrrent of 0~/~ shown in Fig~ the armature is retracted toward the large magnetic pole 13b and thus the movable contacts are restored to the other stationary contacts, respectively, under the intrinsic restoring resiliency of tbe ' ~23~5:~
movable contact arms which overcornes the sticlcing force exerted to the small magnetic pole 13a. In this way, the operation characterist;cs illustrated in flg. ~ can be attained.
As will be apparent from the for.egoing, a monostable relay can be easily implemented by using a yoke of the structure according to the invention without need for the subseqllent acljustment of the load presented by the movable contact arms.
Furthermore, a bistable relay can be readily changed or modified to a monostable relay by merely exchanging the yokes, whereby the manufacturing process of the polarized relays of both operation types can be much facilitated and simplified.
Although the invention has been described in connec-tion with the illu~ rated embodiment, modifications and variations r ~
thereof will ~a~ilu occur to those skilled in the art without departing from the spirit and scope of the invention which is .,._ . .
therefore never restricted to the disclosed embodiment.
the yoke 4 ShOWIl in ~ig. 1. Except for this feature, the other structure of the relay accord;ng to the invention is same as that of the hitherto known relay.
Referring to Fig. 5, a reference numeral 13 shows a yoke of substan'.ially U-like configuration. The yoke 13 has a leg~ 3c at one end to which the core wound with an electromagrletlc coil is fixedly connected. A pair of upstanding legs 13a and l3b are provided at the other end in opposition to each other with a distance therebetween for accommodating movably the movable magnetic block or armature constituted by the permanent magnet and others as described hereinbefore. It is important to note that ~he leg 13a is partially cut away in order to reduce the effective area of the magnetic pole when compared with that of the other leg 13b. The yoke 13 is incorporated in the structure of the polarized relay in the same manner as the hitherto known ." _..
relay.
In operation, upon electric energization of the magnetic coil, the movab~e magnetic block or armature can be ~caused to be attracted to the upstanding lèg 13a when the magnetization oE
the permanent magnet 6 and other factors are correspondingly dimensioned, whereby the movable contacts carried by the resilient contact arms are closed to respective ones of the stationary contacts. On the other hand, upon deenergization of the relay tcorresponding to excltation c~lrrent of 0~/~ shown in Fig~ the armature is retracted toward the large magnetic pole 13b and thus the movable contacts are restored to the other stationary contacts, respectively, under the intrinsic restoring resiliency of tbe ' ~23~5:~
movable contact arms which overcornes the sticlcing force exerted to the small magnetic pole 13a. In this way, the operation characterist;cs illustrated in flg. ~ can be attained.
As will be apparent from the for.egoing, a monostable relay can be easily implemented by using a yoke of the structure according to the invention without need for the subseqllent acljustment of the load presented by the movable contact arms.
Furthermore, a bistable relay can be readily changed or modified to a monostable relay by merely exchanging the yokes, whereby the manufacturing process of the polarized relays of both operation types can be much facilitated and simplified.
Although the invention has been described in connec-tion with the illu~ rated embodiment, modifications and variations r ~
thereof will ~a~ilu occur to those skilled in the art without departing from the spirit and scope of the invention which is .,._ . .
therefore never restricted to the disclosed embodiment.
Claims (3)
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. A monostable type relay, comprising: a bar-like core yoke member having one end connected to said bar-like core at one end thereof and extending substantially in parallel with said core, said yoke member having at the other end a pair of lateral upstanding legs disposed in opposition to each other so as to define a space therebetween, the other end of said core being positioned substantially at a mid point of said space; a movable magnetic block generally U-shaped in section having a pair of legs magnetically polarized in opposition to each other and so disposed that one of said polarized legs is positioned in an air-gap defined between one of said upstanding legs and said core, and the other of said polarized legs is positioned in an air-gap defined between the other of said upstanding legs and said core, respectively; elongated contact arms made of an electrically con-ductive resilient material and disposed substantially in parallel with said elongated yoke member in juxtaposition therewith, each of said contact arms having one end secured fixedly and other free end carrying a movable contact and being operatively coupled to said magnetic block so that said movable contact selectively makes contact with associated stationary contacts disposed in opposition to each other with said movable contact being inter-posed therebetween; wherein the effective area of the magnetic pole produced in one of said upstanding legs of said yoke member is dimensioned smaller than that of the other upstanding leg to such an extent that upon electrical energization of said electro-magnetic coil, said movable magnetic block is moved toward said one leg of said yoke member against intrinsic spring force of said resilient contact arms to a first position where said mov-able contacts are brought into contact with some of said station-ary contacts, respectively, while upon deenergization of said electromagnetic coil, said movable magnetic block is moved toward the other leg of said resilient contact arms to a second position where said movable contacts are brought into contact with the other stationary contacts, respectively.
2. A monostable type relay according to claim 1, wherein said movable magnetic block is composed of a pair of pole plates and a permanent magnet sandwiched between said pole plates and so disposed that said pole plates are positioned in air-gaps defined between one of said upstanding legs and said core and between other upstanding legs and said core, respectively.
3. A monostable relay according to claim 1, wherein said one upstanding leg is decreased in height as compared with the other upstanding leg.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1983061174U JPS59166343U (en) | 1983-04-22 | 1983-04-22 | polarized relay |
| JP61174/1983 | 1983-04-22 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1234851A true CA1234851A (en) | 1988-04-05 |
Family
ID=13163519
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000452647A Expired CA1234851A (en) | 1983-04-22 | 1984-04-24 | Monostable type relay |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US4673908A (en) |
| EP (1) | EP0127309B2 (en) |
| JP (1) | JPS59166343U (en) |
| AT (1) | ATE31228T1 (en) |
| CA (1) | CA1234851A (en) |
| DE (1) | DE3467950D1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6112208U (en) * | 1984-06-25 | 1986-01-24 | 松下電工株式会社 | electromagnet device |
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|---|---|---|---|---|
| US2881365A (en) * | 1955-11-04 | 1959-04-07 | Nathaniel A Karr | Neutral relay |
| US4064471A (en) * | 1976-03-22 | 1977-12-20 | Leach Corporation | Electromagnetic relay |
| DE2629357A1 (en) * | 1976-06-30 | 1978-01-05 | Elmeg | MONOSTABLE, ELECTROMAGNETIC ADHESIVE RELAY |
| FR2358006A1 (en) * | 1976-07-09 | 1978-02-03 | Manuf Fse App Electr | DEVICE FORMING ELECTRO-MAGNET, SUCH AS THAT OF A RELAY |
| DE2816555A1 (en) * | 1977-04-18 | 1978-10-19 | Francaise App Elect Mesure | MAGNETIC CIRCUIT FOR AN ELECTROMAGNET FOR ONE WITH A PERMANENT MAGNET AS ANCHOR |
| JPS564230A (en) * | 1979-05-28 | 1981-01-17 | Kokusai Electric Co Ltd | Etching apparatus utilizing microwave plasma |
| JPS5730232A (en) * | 1980-07-31 | 1982-02-18 | Fujisoku Electric | Self-holding type relay |
| JPS57188816A (en) * | 1981-05-15 | 1982-11-19 | Matsushita Electric Works Ltd | Electromagnet device |
| DE3135171A1 (en) * | 1981-09-04 | 1983-03-17 | Siemens AG, 1000 Berlin und 8000 München | POLARIZED ELECTROMAGNETIC RELAY |
| FR2520152B1 (en) * | 1982-01-20 | 1986-02-28 | Telemecanique Electrique | ELECTRO-MAGNET WITH MOBILE EQUIPMENT WITH PERMANENT MAGNET WITH MONOSTABLE OPERATION |
| JPS593904A (en) * | 1982-06-29 | 1984-01-10 | Omron Tateisi Electronics Co | Polarized electromagnet block |
| US4563663A (en) * | 1982-07-16 | 1986-01-07 | Fujisoku Electric Co. Ltd. | Core member for an electromagnetic relay |
| JPS6245411U (en) * | 1985-09-06 | 1987-03-19 |
-
1983
- 1983-04-22 JP JP1983061174U patent/JPS59166343U/en active Pending
-
1984
- 1984-04-24 DE DE8484302738T patent/DE3467950D1/en not_active Expired
- 1984-04-24 CA CA000452647A patent/CA1234851A/en not_active Expired
- 1984-04-24 AT AT84302738T patent/ATE31228T1/en not_active IP Right Cessation
- 1984-04-24 EP EP84302738A patent/EP0127309B2/en not_active Expired - Lifetime
-
1986
- 1986-01-29 US US06/823,662 patent/US4673908A/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| ATE31228T1 (en) | 1987-12-15 |
| EP0127309B2 (en) | 1992-04-01 |
| DE3467950D1 (en) | 1988-01-14 |
| EP0127309A1 (en) | 1984-12-05 |
| US4673908A (en) | 1987-06-16 |
| EP0127309B1 (en) | 1987-12-02 |
| JPS59166343U (en) | 1984-11-07 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |